Well...
I found this image on the internet. The caption said, "1960 Chevy Hubcap thrown from the upstairs bathroom window. Taken when I was 13 years old with an Argus 'Instamatic' camera. 126 film Kodachrome "
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Carl Sagan used to say, "Extraordinary claims require extraordinary evidence". We humans send an incredible amount of thingamajigs flying in the air. Commercial airplanes, helicopters, military aircraft, blimps, what-do-you-call-them one-person little air-sailing craft, kites, weather balloons, satellites, various flying prototypes, what have you.
So you see a thing flying in the air that you can't identify. What are the chances that this is something man-made after all? Those chances are pretty good, I'd say. What are the chances that you are actually seeing an alien spacecraft carrying aliens that have travelled here from a planet
at least four light-years away? In view of the fact that in spite of circa forty years or more of intense scrutiny of the cosmos for signals from ET, absolutely nothing has been found?
Hey, I'm not saying that ET, or other aliens, don't exist. But what are the chances that they have come here? What are the chances that they have managed to find the Earth in the galactic haystack in the first place and then actually travelled here across the light-years? If so, what are the chances that they have managed to avoid discovery as they approached the Earth, in spite of all the hordes of amateur astronomers diligently watching the sky, and then plunged through the atmosphere without absolutely anybody noticing? But when they came down to a couple of hundred feet above ground, they were suddenly spotted by YOU? Or by some other person with a camera?
Extraordinary claims require extraordinary evidence. When astronomers spot something weird entering the solar system on a direct course for the Earth, and when they follow this weird spacecraft as it passes the orbits of Neptune, Uranus, Saturn, Jupiter and Mars until it descends through the atmosphere of the Earth, and when the TV cameras show us the aliens live as they land in New York, London, Beijing or another great city, and when we can see the aliens actually stepping out of their spacecraft (that's a small step for an alien, but a giant leap for aliens), then I'll believe. Unless credible astronomers tell me that it was probably a hoax after all.
Ann